Riddle for sand-sifters.



Patented Dec. 1, 1914.

amuewbo'o c. 17

VHF NORRIS PErL'Hico. r'nom ur/m wnsumnwu I JOSEPH F. DURKIN,WILKES-BARBIE, PENNSYLVANIA.

RIDDLE FOR SAND-SIFTERS.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Application filed May 16, 1912. Serial No. 697,767.

T 0 all whom it may COW-67%.

Be it known that I, Josnrn F. DURKIN, citizen of the United States,residing at VViIkesBaI-re, in the county of Luzerne and State ofPennsylvania, have invented certain new and useful Improvements inRiddles for SandSifters, of which the following is a specification.

This invention relates to riddles for use in sifting sand, and has asits object to provide an improved riddle which will be more durable andefficient than the ordinary riddles used for this purpose. Such riddlesare ordinarily constructed with a WOOClGD rim or body having a wirebottom which is fixed therein and the riddles are made of differentsizes, that is to say, with bottoms of different sized mesh. After sucha riddle has been in use for a relatively short length of time, thewooden rim will be so cut by the sand as to render the riddle useless.

The present invention therefore has as one of its aims to provide ariddle so constructed that its rim will not be liable to be cut by thesand, and as another aim to provide the riddle with a number ofremovable bottoms having openings of different sizes so as to adapt thesame riddle for use in screening different grades of sand.

For a full understanding of the invention reference is to be had to thefollowing description and accompanying drawing, in Which:

Figure 1 is a perspective View of the riddle embodying the presentinvention, a portion of the bottom thereof being broken away. Fig. 2 isa vertical transverse sectional view through the riddle and thesupporting member of the sifter. Figs. 3 and 4 are transverse sectionalviews through modified forms of bottoms for the riddle.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingby the same reference characters.

While as before stated, the principles of the present invention are tobe embodied in a riddle designed primarily for use by hand, it will bereadily understood that the riddle herein shown and described may bearranged within the supporting rim or head of any of the ordinary sandsifting machines, and that the rim of such a machine may be formed witha flange and a set of bottoms such as herein shown may be provided inconnection with the machine and rcmovably supported upon the flange ofthe rim, in which event the rim will take the place of the rim or bodyof the riddle shown in the drawing. The body of the riddle is indicatedby the numeral 7 and is formed of metal and, as in the case of the bodyof the ordinary riddle, is cylindrical.

By referring o Fig. 2 of the drawing it will be observed that the body 7is formed interiorly near its lower end with an annular flange 8, andsecured at its ends in this flange at diametrically opposite points is awire 9.

By reference to Fig. 2 of the drawing it will be seen that the innersurface of the body7inclines inwardly toward the flange 8 and that theedges of the perforated bottom fit snugly against the inner surfaces ofthe wall of the body and upon the upper surface of the flange 8.

As before stated, the riddle is provided with a number of perforatedbottoms which are removable and have their openings of differentdiameters so that the riddle may be readily and quickly adapted forscreening different grades of sand and each of these bottoms ispreferably in the nature of a sheet metal plate 10 formed with openings11. The bottom shown in Fig. 2 is concaveconvex and has its concave sidepresented downwardly, it being disposed upon the flange 8 and the endsof the wires 9. as clearly shown in the said figure. Another form ofbottom is shown in Fig. 3 of the drawing and consists of a flatsheet-metal circular plate 12 and may be substituted for the bottom 10.Another form of bottom plate is shown in Fig. 4 of the drawing, thisplate being indicated by the numeral 13 and being formed withcircumferential corrugations 14 and with perforations 15.

From the foregoing description of the invention it will be readilyunderstood that there is provided a riddle. the bodv 10 of which willnot be liable to be worn through by the cutting action of the sand beingscreened and which is so constructed that bottoms having openings ofvarious diameters may be readily arranged therewithin so that the riddlemay be readily and quickly adapted for use in screening different gradesof sand. It will further be observed that the Wires 9 serve to supportthe middle portions of the screen bottoms so as to prevent sagging.

Having thus described the invention What is claimed as new is 1. Asifting riddle comprising an annular body having a supporting ledgeprojecting inwardly therefrom, the inner surface of the body beingtapered so as to diverge up- Wardly from the upper face of the ledge,and a foraminous bottom adapted to be mounted loosely Within the bodyand to rest upon the supporting ledge.

2. A sifting riddle comprising a body having a supporting ledgeprojecting inwardly therefrom, the inner surface of the body beingtapered so as to diverge upwardly from the upper face of the ledge, anda concavo-convex, foraminous bottom adapted to be mounted loosely Withinthe body with its convex face uppermost and to rest upon the supportingledge.

In testimony whereof I aflix my signature in presence of two witnesses.

JOSEPH F. DURKIN. 1,. 3. Witnesses:

T. F. MCLAUGHLIN, W. P. VVALSH.

Gimme of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

